/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet.edt;

import bdd.DBLink;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author boomar
 */
public class PromotionSupplier extends HttpServlet {

    public static final String SELECT_PROMOTION = "SELECT * FROM PROMOTION WHERE NUMFORMATION = ?";

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            int idPromotion;
            int idFormation = (request.getParameter("formation") == null || request.getParameter("formation").equals("")) ? 0 : Integer.parseInt(request.getParameter("formation"));
            int selectedPromotion = (request.getParameter("selectedPromotion") == null || request.getParameter("selectedPromotion").equals("")) ? 0 : Integer.parseInt(request.getParameter("selectedPromotion"));

            DBLink dbLink = new DBLink();
            dbLink.connexion();
            dbLink.setPst(dbLink.getConnection().prepareStatement(SELECT_PROMOTION));
            dbLink.getPst().setString(1, Integer.toString(idFormation));
            dbLink.setRs(dbLink.getPst().executeQuery());
            
            out.println("<select id=\"selectPromotion\" onchange =\"selectIndexChanged(this.id)\" >");
            out.println("<option value=\"\"></option>");
            while (dbLink.getRs().next()) {
                idPromotion = dbLink.getRs().getInt("NUMPROMOTION");
                out.println("<option value =\"" + idPromotion + "\" " + (selectedPromotion == idPromotion ? "SELECTED" : "") + "> " + idPromotion + " </option>");
            }
            out.println("</select>");
        } catch (Exception e) {
            e.printStackTrace(out);
            out.println("<p>" + e.getMessage() + "</p>");
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
